Instance-based domain ontological view creation towards semantic integration

Authors:
Yunjiao Xue;Hamada H. Ghenniwa;Weiming Shen
Affiliations:
Department of Electrical and Computer Engineering, The University of Western Ontario, London, Ontario, Canada;Department of Electrical and Computer Engineering, The University of Western Ontario, London, Ontario, Canada;Department of Electrical and Computer Engineering, The University of Western Ontario, London, Ontario, Canada and Centre for Computer-assisted Construction Technologies, National Research Council, ...
Venue:
Expert Systems with Applications: An International Journal
Year:
2011

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Abstract

In many domains today there are very limited explicit ontologies established for implementing information systems. Traditional ontology-driven semantic integration approaches cannot be directly applied in integrating these information systems. Usually, the information systems have schemas, a type of formal information model, for their information repositories which to some extent imply the semantics of the information. Each schema actually reflects a specific view of the domain conceptualization. This paper investigates the theoretical foundation of ontologies and extends the traditional ontology concept to the ontological view concept. It proposes to use ontological views to address the challenge of semantic integration. The proposed approach adopts the schemas to create local ontological views, uses data instances of the information systems to discover semantic relationships between the concepts within the ontological views, and builds a domain ontological view based on the discovered equivalence mappings. It applies the hierarchical clustering technique on the data instances and, in the further analysis, uses the clusters to reduce the cost of processing a large amount of data. The matching of concept properties is based on the probability distribution of the data instances. The experimental results have demonstrated the effectiveness of this approach.